Clinton’s campaign says the George W. Bush’s former deputy secretary of state has endorsed her candidacy.

He told Politico that Trump “doesn’t appear to be a Republican” and “doesn’t appear to want to learn about the issues.”

Armitage refused to confirm his support for Clinton to the Associated Press.

He is the most prominent Republican to back Clinton. Dozens of foreign policy and national security experts signed a letter earlier this year opposing Trump but few have openly said they will vote for Clinton. They say Trump’s views on international affairs are inconsistent and would make the country less safe.

The likely GOP nominee in a lengthy statement accuses the AFL-CIO of selling out its members by endorsing a candidate he alleges is “the enemy of working people.”

He says, “The leadership of the AFL-CIO has made clear that it no longer represents American workers.”

Trump goes on to predict the union’s members will wind up voting for him in much larger numbers than Clinton in November, despite their union’s endorsement.

He adds that Clinton’s ties to Wall Street means she “is the enemy of working people.” Trump vows to “fight harder for American workers than anyone ever has.”

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11:16 a.m.

Hillary Clinton has won the endorsement of the AFL-CIO, the nation’s largest labor federation, in another sign of her consolidation of the Democratic party heading into next month’s Philadelphia convention.

The AFL-CIO’s general board voted to endorse Clinton over Vermont Sen. Bernie Sanders, a move that had been expected since Clinton had secured enough support among delegates to become the presumptive Democratic nominee.

The labor federation includes 12.5 million members and is a potent force in Democratic politics. Union leaders have been gearing up for a general election showdown against Republican Donald Trump, whom they portray as a threat to working families.

The AFL-CIO had withheld its endorsement during the primaries as Clinton was challenged by Sanders.